James c fix 3270 bugs

[James-Cocker]

Why?

Closes galasa-dev/projectmanagement#2552 by fixed all the mentioned issues.

Changes

• Moves the tag fetching to the testRunDetails page to avoid the lazy loading from the carbon component.
• Makes the max-height of the table of screenshots !important to override some odd carbon behaviour (cannot test on localhost but tested this directly in browser)
• Created cache for the api config in runsAction.ts, as well as a way to reset it for unit tests
• Fixed 3270 loading issue by ensuring the table is rendered before flicking to the tab (unsure why this works)
• Fixed the URL not flicking to the correct terminalImage which was introduced by the above
• Fixed broken unit tests